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Satellites and Space Science - Class X

Questions about satellites, orbital mechanics, spacecraft, and space stations for Class X students

11 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Communication satellites move in orbits of radius 44,400 km around the earth find the acceleration of such a satelite, assuming that the only force acting on, it is that  due to the earth.Mass of the earth $ = 6 \times {10^{24}}Kg.$

  1. $0.2\;m{s^{ - 2}}$
  2. $2.1\;m{s^{ - 2}}$
  3. $4.2\;m{s^{ - 2}}$
  4. $0.3\;m{s^{ - 2}}$
Question 2 Multiple Choice (Single Answer)

A particle is projected vertically upward and is at a height h after $\displaystyle { t } _{ 1 }$ seconds and again after $\displaystyle { t } _{ 2 }$ seconds, then:

  1. $\displaystyle h={ gt } _{ 1 }{ t } _{ 2 }$
  2. $\displaystyle h=\frac { 1 }{ 2 } { gt } _{ 1 }{ t } _{ 2 }$
  3. $\displaystyle h=\frac { 2 }{ g } { t } _{ 1 }{ t } _{ 2 }$
  4. $\displaystyle h=\sqrt { { gt } _{ 1 }{ t } _{ 2 } } $
Question 3 Multiple Choice (Multiple Answers)

In case of an orbiting satellite, if the radius of orbit is decreased.

  1. Its KE decreases
  2. Its PE decreases
  3. Its ME decreases
  4. Its speed decreases
Question 4 Multiple Choice (Single Answer)

If for a given angle of projection, the horizontal range is doubled, the time of flight becomes

  1. $4 times$
  2. $2 times$
  3. $\sqrt 2 \;times$
  4. $\frac{1}{{\sqrt 2 }}\;times$
Question 5 Multiple Choice (Single Answer)

Two identical satellites are moving in the same circular orbit around the earth but in opposite senses of rotation, Assuming an inelastic collision to take place, so that the wreckage remains as one piece of tangled material  wreckage

  1. will be moving in a circular orbit of half the radius
  2. will be moving in a circular orbit on one fourth the radius
  3. will spin with no translatory motion
  4. falls directly down
Question 6 Multiple Choice (Single Answer)

The full form of NASA is ?

  1. National Aerospace and Space Administration
  2. National Aeronautics and Satellite Administration
  3. National Aeronautics and Space Administration
  4. National Aeronautics and Space Academy
Question 7 Multiple Choice (Single Answer)

State whether the given statement is True or False :

The space shuttle is moving van which carries astronauts and many things in space ?

  1. True
  2. False
Question 8 Multiple Choice (Single Answer)

The International space Station is currently under construction. Eventually, simulaced earth gravity may become a reality on the space station.What would the gravitational  field through the central axis be like under these conditions?

  1. zero
  2. $0.25 g$
  3. $0.5 g$
  4. $0.75 g$
Question 9 Multiple Choice (Single Answer)

When the temperature raised to $50^0C$, how did scientist adjust its temperature?

  1. The temperature was brought down by about $10^\circ C$ by rotating the spacecraft about 20 degrees and switching off some of the instruments
  2. The temperature was brought down by about$ 0^\circ C$ by removing the parts spacecraft.
  3. The temperature was brought down by about $30^\circ C$ by rotating the spacecraft about 100 degrees and by removing some of the instruments
  4. None of the above
Question 10 Multiple Choice (Single Answer)

Which of the following is an Air-to-Air Missile?

  1. Astra
  2. Aakash
  3. Prithvi
  4. None of these
Question 11 Multiple Choice (Single Answer)

Geo stationary satelites revolves at:

  1. Any height
  2. Fixed height
  3. Height above pole
  4. height which depends upon its mass
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